Hydraulic control device



Jan. 4, 1927.

1 1,613,563 J. G. GRATTAN HYDRAULIC CONTROL DEVICE Original Filed Nov.6, 1923 IN VEN TOR Joseph Grattan A TTORNE Y.

Patented Jan. 4, 1927.

UNITED STATES 1,613,563 PATENT OFFICE.

JOSEPH G. GRATTAN, OF LONG- BEACH, CALIFORNIA.

HYDRAULIC oournor. DEVICE. 1

Application filed November 6, 1923, Serial No. 678,080. vRenewedDecember 8, 1926 My invention relates to suspended by;- draulics andmore particularly to a hydraulic control device for rotary drills foroil wells.

The principal objects of my invention are as follows:

To make possible the use of a diamond bit in conection with a rotarydrill.

To control the feed of drill bits whether diamond, fish tail or othertypes.

To make possible reaming when withdrawing the bits. When fishing to makepossible feeling of pipe, bit or other object while the drill isrotated.

To enable the bit to be lifted from the bottom of the well while beingrotated.v

When milling to insure a uniform fee tothe milling tool.

Other objects and advantages will appear hereinafter and while I showherewith and will describe a preferred form of construction, I desire tobe understood that I do not limit my invention to such preferred formbut that various changes and adaptations 1 may be made therein withoutdeparting I from the spirit of my invention as hereinafter claimed. Y

' Referring to the drawing:

ig. 1 is a vertical longitudinal section of the piston and cylinder unitof my invention.

Fig. 2 is a bottom plan view of the unit, shown inFig. 1.

Fig. 3 is a fragmentary sectional view taken on line 33 of Fig. 1.

Fig. 4 is a side elevation of my invention complete.

Fig. 5 is a cross section of the controlling valve.

In the drawing 1 indicates a piston and cylinder connecting unit and-2 apump unit. The unit 1 comprises a vertical cylinder 3 and a piston 4reciprocatively mounted in said cylinder. Said cylinder includes acylindrical wall 5, a lower head 6 and an upper head 7, the head 6 beingprovided w1th an annular groove 8 in which is fitted the lower end ofsaid wall and the upper head being provided with an annular groove saidbolts against the upper face of the -upper head 7. The piston 4comprises a head 18 and a rod 19 which extends downwardly from said headthrough a packing box 20 in the lower cylinder head 6.

An eye 21 is formed on the lower end of the piston rod 19. A bail 22 isformed with eyes 23 on its lower ends which fit between the bolt eyes 14and a pivot bolt 24 extends through said bolt eyes and bail eyes,-whereby the bail is connected to the upper ends of the bolts 10. Thehead 6 is, formedwith a recess 25 in its upper side within the cylinder3 and the head is provided with a duct 26 leadlng through one sidethereof into .said recess. The head 7 is provided with a 30 recess 27 inits under side and with a duct I 28 leading through one side thereofinto said recess. p

The eye 21 is connected by a clevis 30 to the upper end of a swivel 31,which connects the upper end of the rotary drill tube 32 into the upperend' of which leads the water circulatmg tube 33. The bail 22-is engagedby a hook 34 on the lower end of the usual block 35, which is suspendedwithin the oil well derrick (not shown).

An eye 36 "is secured on the upper head 7 to be engaged by a hook on theend of a cat line (not shown) for drawing and holding the unit lvto oneside of the derrick. The pump unit 2 comprises a pump 40, a controlvalve 41, stand pipes 42 and 43, discharge pipes 44, 45 and 46, petcocks 47 and 48 which control the flow of the water from valve 41throughdischarge pipes 45 and 46, and flexible tubes 49 and 50, the tube49 connecting at one end to stand pipe 42 and at its other end to duct26. and the tube 50 connecting at one end to the stand pipe 43 and atits other end to the duct-28.

The pum intake 51-leads from a water tank (not s own) into which tankthe pipes 44 and 45 discharge, the pipe 46 being connected at 52 belowpet cook 47 to the pipe 45 and discharging into said pipe. The pumpressure me 53 connects to the lower side 0 the va ve 41. The stand pipes42 and 43 respectively and the pipes 46 and respectively connect to theleft and right sides of valve41. The pipe 44 leads from the top of valve41.,

The plug of valve 41 has two ports 56 and 57 The port 56 is adapted toconnect the pressure pipe 53 and the pipes 42 and 46 or the pipe 44 andpipes 42 and 46. The port 57 is adapted to connect pipe'44 and pipes 43and 45 or the pressure pipe 58 and pipes 43 and 45. A handle isconnected to the valve plug 55 for turning said plug to operate thevalve 41.

When the valve 41 is in the position shown, water is pumped throughvalve port 56 and pipe 42, tube 49, and duct 26 into the lower end ofcylinder 3 whereby the piston 4 is raised which raises the drill pipe32, While the water in the cylinder above the piston is forced outthrough duct 28, tube 50, pipe 43, port 57, and pipe 44 into the watertank not shown). When the valve plug 57 is reversed water is pumpedthrough port 57, pipe 43, tube 50, and duct 28 into the top of cylinder3, which forces the piston 4 and the drill pipe 32 down, while the waterin the cylinder below the piston is forced by the piston out throughduct 26, tube 49, pipe 42, port 56 and pipe 44 into the water tank. Thepet cock 46 or 47 may be opened to allow the water to run slowly out ofthe bottom or top of thecylindrical wall, eye bolts extending throughthe heads diametrically opposite each other with the eyes at the top,clamping bolts connecting the heads between the eye bolts, a pivot boltmounted in the eyes, a bail having eyes fitting upon the pivot bolt,there being a recess in the upper face of the lower head and a ductleading to the recess and there being a recess in the lower side of theupper head, and a duct leading to the recess, a piston head in thecylindrical wall, a piston rod extending from the piston head throughthe lower head of the cylindrical wall, and an eye upon the lower end ofthe piston rod, said eye being connected to the rotary swivel of a drillpipe, and there being means for supplying water under pres sure throughsaid ducts to the upper and lower sides of the piston head,

JOSEPH G. GRATTAN.

